Feed-motion for lathes.



No. 65|,4|7. Patented lune l2, l900.-

N. H. FAY.

FEED MUTION FOR LATHE'S.

(Application led Dec. 7, 1899.)

(No Model.)

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PATENT NORMAN H. RAY, orv DEXTER, MAINE;

FEED-MOTION FOR LATHES.

sirncIEIcATIoN forming para or Letters Patent No. 651,417, dated June 12, 1900.

Application filed December 7, 1899. Serial No. 739.468. (No model) To all wiz/0m t may concern:

Be it known that I, NORMAN H. FAY, a citizen of the United States of America, and a resident of Dexter, county of Penobscot,State of Maine, have invented certain new and useful Improvements in Feed-Motions for Lathes, of which the following is a specication.

My invention relates to feed-motions for en gine-lathes 5 and the object of the invention is to provide mechanism by which a single driving-screw will be enabled to do the work of a lead-screw and feed-rod by being shifted quickly from a slow speed, adapted to screwcutting, duc., to a higher speed, adapted to general work.

The invention consists, essentially, of two shafts, one journaled Within thel other and each being driven at a different rate of speed and each having on its inner end a clutch adapted to engage in turn an intermediate clutch,which is secured at one end of a sleeve, the other end 0f the sleeve being connected with the feeding-screw. By bringing one or the other clutch into engagement with the intermediate clutch the motions of one or the other of the shafts is conveyed to the feeding-screw.

I illustrate my invention by means of the accompanying drawings, in which- Figure l is a general longitudinal section, some of the parts being shown in elevation; and Fig. 2 is a section on a: .fr and y y of Fig. l.

A represents the frame of the lathe looking from the front side.

B is the feeding-screw, which feeds the slide, the latter not being shown, and b is one of the bearings. Beyond the end of the feedin g-screw and in line therewith are two shafts, an exterior hollow shaft D and. an interior shaft C, journaled therein, terminating adjacent to the end of the feeding-screw. The exterior shaft D is journaled in a suitable bearing d near the end of the lathe. These shafts are provided with means for rotating them at a dierent rate of speed. As here shown, the interior shaft C has on its outer end a cone-pulley E, while the shaft D is provided with a gear F between the cone-pulley and the end of the lathe. It will be understood that thc cone-pulley and the interior shaft are driven in the usual manner at speeds adapted to general work, while the gear and the exterior shaft are driven at speeds adapted to screw-cutting.

vOn the inner end of' the shaft D isa clutch f and on the inner end of the shaft C is a clutch c. These two clutches are far enough apart to permit an intermediate clutch g to be located between them and so that it will not engage either of them when it is in its central position. The clutch g is loosely mounted on the shaft C, so as to slide longitudinally thereon, and it is provided on each side with indented faces which engage like faces on the clutches f and c. The motion of the clutchesfand c and of their respective shafts is conveyed to the 'feeding-screw by means of a sleeve Gr, to the interior of which the clutch g is secured at one end, the opposite end being connected with the end of the feeding-screw by means of a spline b or other equivalent connection, which allows the sleeve to be moved longitudinallyon the shaft while rotating therewith. 'Ihe sleeve is pro- 'vided with an annular groove g', which is engaged by the end of a shipping-lever g2, pivoted to the frame of the lathe, or the sleeve may be moved by any other suitable device.

From the above description it will be seen that by throwing the lever g2 one way or the other the motion of one or the other of the shafts C or D may be transferred to the feeding-screw B, both of said shafts being always in motion.

The advantage of this construction will be obvious to persons operating lathes. When the latter is to be used for screw-cutting, the lever g2 is simply thrown over to the right, and when it is to be used for general Work it is thrown to the left.

The mechanism is simple, compact, and easily manipulated, and it enables a single feeding-screw to do the Work of a lead-screw and feed-rod without changing belt or gears at head of lathe.

I'claim- In a feed-motion for lathes, the combination of a hollow exterior shaft, an interior shaft journaled therein, means for driving said shafts at unequal speeds, a clutch on the IOO inner end of each shaft, an intermediate cluth on the end of the interior shaft and clutch mounted on said inner shaft between means for sliding said sleeve longitudinally, said clutches and adapted to engage with substantially as shown.

either, a sleeve rigidly secured by one end to NORMAN Il. FAY. said intermediate clutch and by the other Witnesses: end to the feeding-screw with a spline con- F. D. DEARTH,

neetion and extending over :md inelosing the l J. W. IIAINES. 

